PHP 7.2 Parameter Type Widening - Omit type hints of parent methods

Code
<?php

/**
 * Interface with type hints in method
 */
interface Foo
{
    public function doStuff(string $str, Iterator $iterator);
}

/**
 * Abstract class with type hints in method
 */
abstract class Bar
{
    public function doStuff(string $str, Iterator $iterator)
    {
        echo __class__ . PHP_EOL;
    }
}

/**
 * Class with type hints in method
 */
class Baz
{
    public function doStuff(string $str, Iterator $iterator)
    {
        echo __class__ . PHP_EOL;
    }
}

/**
 * Class implements interface but omits type hints
 */
$object = new class() implements Foo {
    public function doStuff($str, $iterator)
    {
        echo $str . PHP_EOL;
    }
};

$object->doStuff('Interface', new EmptyIterator());

/**
 * Class extends abstract class but omits type hints
 */
$object = new class() extends Bar {
    /**
     * Overwrites method of abstract class
     */
    public function doStuff($str, $iterator)
    {
        echo $str . PHP_EOL;
    }
};

$object->doStuff('Abstract', new EmptyIterator());

/**
 * Class extends other regular class but omits type hints
 */
$object = new class() extends Baz {
    /**
     * Overwrites method of class, but keeps first type hint
     */
    public function doStuff(string $str, $iterator)
    {
        echo $str . PHP_EOL;
    }
};

$object->doStuff('Class', new EmptyIterator());
Result
Interface
Abstract
Class
Used Versions
PHP 8.3, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8